The utility model relates to a double light roll crushing equipment with permanent magnet dry pre-selection function, which comprises two double light rollers symmetrically arranged left and right. A crushing zone is formed between the two light rollers. A non-magnetic product trough is arranged directly below the crushing zone, and a magnetic product trough is symmetrically arranged on both sides of the non-magnetic product trough, and two magnetic products are arranged on both sides of the non-magnetic product trough. The grooves are located under the double-light rollers on the same side. There is a magnetic system fixed in the double-light rollers. The magnetic system is stationary relative to the double-light rollers. The magnetic system does not rotate with the double-light rollers. The magnetic system is a permanent magnet four-stage magnetic system fixed in the rollers of the double-light rollers. The magnetic poles are arranged alternately along the circumference. The magnetic system wrap angle is between 40 degrees and 200 degrees. The utility model has the advantages of simple and reasonable structure, convenient operation and long service life, combines crushing with dry pre-selection, and has better effect of dry pre-selection of fine iron ore particles crushed by double light rolls, and higher tail throwing rate.
【技术实现步骤摘要】
具有永磁干式预选功能的双光辊破碎设备
本技术涉及一种具有永磁干式预选功能的双光辊破碎设备,属于矿物加工工程
技术介绍
我国的铁矿石资源虽然比较丰富,但可直接入炉炼铁、炼钢的富铁矿资源储量很少,大多是低品位、组分复杂以及难选的矿石。我国铁矿石平均品位仅为33%,比世界平均水平低10%以上。因此几乎全部开采的矿石都需经过选矿技术的处理,以提高冶炼的原料品位与有用成分的综合利用程度。而在许多处理铁矿石的选矿厂中,常在粗碎或中碎后增加永磁磁滑轮进行干式预选,预先抛弃混入矿石中的废石,不仅可提高球磨机的入磨品位、增大磨机的处理能力,达到节能、降耗、增效的目的,而且抛除的部分粗粒脉石不用进入尾矿库,因而还可大大延长尾矿库的服务年限。在实际生产中,由于开采和破碎过程中难免会产生大量粉矿,使得干式抛尾多数存在抛尾量少、品位提高幅度小、磁性铁损失较大等问题,尤其是在气候潮湿的南方或者北方多雨季节,问题尤为突出。
技术实现思路
本技术提出一种具有永磁干式预选功能的双光辊破碎设备,增强干式预选效果。本技术解决技术问题所采用的方案是,一种具有永磁干式预选功能的双光辊破碎设备,包括左右对称设置的两个双光辊筒,双光辊筒之间形成破碎区间,破碎区间正下方设置有非磁性产物槽,非磁性产物槽左右两侧对称设置有磁性产物槽,两个磁性产物槽分别位于与其同侧的双光辊筒下方,双光辊筒内固定有磁系,磁系相对双光辊筒静止,其不随双光辊筒旋转。进一步的,所述磁系为固定在双光辊筒的辊体内的永磁四级磁系,其磁极的磁性是沿圆周交替排列的,磁系包角α在40°~200°之间,磁系首端位于双光辊筒的内侧中部,磁系末 ...
【技术保护点】
1.一种具有永磁干式预选功能的双光辊破碎设备,其特征在于:包括左右对称设置的两个双光辊筒,双光辊筒之间形成破碎区间,破碎区间正下方设置有非磁性产物槽,非磁性产物槽左右两侧对称设置有磁性产物槽,两个磁性产物槽分别位于与其同侧的双光辊筒下方,双光辊筒内固定有磁系,磁系相对双光辊筒静止,其不随双光辊筒旋转。
【技术特征摘要】
1.一种具有永磁干式预选功能的双光辊破碎设备,其特征在于:包括左右对称设置的两个双光辊筒,双光辊筒之间形成破碎区间,破碎区间正下方设置有非磁性产物槽,非磁性产物槽左右两侧对称设置有磁性产物槽,两个磁性产物槽分别位于与其同侧的双光辊筒下方,双光辊筒内固定有磁系,磁系相对双光辊筒静止,其不随双光辊筒旋转。2.根据权利要求1所述的具有永磁干式预选功能的双光辊破碎设备,其特征在于:所述磁系为固定在双光辊筒的辊体内的永磁四级磁系,其磁极的磁性是沿圆周交替排列的,磁系包角α在40°~...
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